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https://github.com/projectacrn/acrn-hypervisor.git
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8b16be9185
Many of the license and Intel copyright headers include the "All rights reserved" string. It is not relevant in the context of the BSD-3-Clause license that the code is released under. This patch removes those strings throughout the code (hypervisor, devicemodel and misc). Tracked-On: #7254 Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <types.h>
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#include <errno.h>
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#include <asm/lib/spinlock.h>
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#include <asm/cpu.h>
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#include <asm/msr.h>
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#include <asm/cpuid.h>
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#include <asm/guest/ucode.h>
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#include <asm/guest/guest_memory.h>
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#include <asm/guest/virq.h>
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#include <logmsg.h>
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#define MICRO_CODE_SIZE_MAX 0x40000U
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static uint8_t micro_code[MICRO_CODE_SIZE_MAX];
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uint64_t get_microcode_version(void)
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{
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uint64_t val;
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uint32_t eax, ebx, ecx, edx;
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msr_write(MSR_IA32_BIOS_SIGN_ID, 0U);
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cpuid_subleaf(CPUID_FEATURES, 0x0U, &eax, &ebx, &ecx, &edx);
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val = msr_read(MSR_IA32_BIOS_SIGN_ID);
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return val;
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}
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/*
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* According to SDM vol 3 Table 9-7. If data_size field of uCode
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* header is zero, the ucode length is 2000
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*/
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static inline size_t get_ucode_data_size(const struct ucode_header *uhdr)
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{
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return ((uhdr->data_size != 0U) ? uhdr->data_size : 2000U);
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}
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/* the guest operating system should guarantee it won't issue 2nd micro code update
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* when the 1st micro code update is on-going.
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*/
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void acrn_update_ucode(struct acrn_vcpu *vcpu, uint64_t v)
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{
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uint64_t gva, fault_addr = 0UL;
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struct ucode_header uhdr;
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size_t data_size;
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int32_t err;
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uint32_t err_code;
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gva = v - sizeof(struct ucode_header);
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err_code = 0U;
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err = copy_from_gva(vcpu, &uhdr, gva, sizeof(uhdr), &err_code,
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&fault_addr);
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if (err < 0) {
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if (err == -EFAULT) {
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vcpu_inject_pf(vcpu, fault_addr, err_code);
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}
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} else {
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data_size = get_ucode_data_size(&uhdr) + sizeof(struct ucode_header);
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if (data_size > MICRO_CODE_SIZE_MAX) {
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pr_err("The size of microcode is greater than 0x%x",
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MICRO_CODE_SIZE_MAX);
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} else {
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err_code = 0U;
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err = copy_from_gva(vcpu, micro_code, gva, data_size, &err_code,
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&fault_addr);
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if (err < 0) {
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if (err == -EFAULT) {
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vcpu_inject_pf(vcpu, fault_addr, err_code);
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}
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} else {
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msr_write(MSR_IA32_BIOS_UPDT_TRIG,
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(uint64_t)micro_code + sizeof(struct ucode_header));
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(void)get_microcode_version();
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}
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}
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}
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}
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